The Bronica ETRsi is one solid medium format beast but how does it perform when coupled with a 35mm back? Not the normal 35mm back but the wide version...the 135W (very rare!) back!
What happens when a 120mm camera gets coupled with a wide 35mm back? Top that up with a metered prism and all I can say is that you’ll get endless fun with the set up.
Using the pano format back means you will (or rather…might) need to have frame lines on the focusing (if you bother about composition). You can find some of the focusing screens for 35mm backs on eBay or simply draw lines on the focusing screen with a marker pen. Of course it won’t look as neat as the 35mm screens, but hey, it works as well. :)